I just caught Kyo scratching at the inside of her food dish kinda like she was trying to cover it (like a dog or cat). She continued to eat afterward. Is she picking out what she likes the most (there are 3 different greens in there)?
I would say yes. Iguanas are well known for picking out part of the food, particularly colored peices. Some igs are so bad about it that their owners shred and mix up their veggies so they have to eat it all.